Most crushing of all was this tweet: "I liked JWoww much better when he played Lord Voldemort."

It wasn't all disses for Jwoww though, with a fan tweeting "Why's everyone saying jwoww looks horrible now!! I think she looks better than ever" ... and another saying "JWOWW looks better every season."

As a comparison, check out a promo shot for Season 4 ... and back in Season 1 in 2009.

What do you think of her new look? Sound off below -- and check out the gallery for more stars with surprising weight losses.